Boots – shoes – and leggings
Patent
1990-07-11
1993-06-08
Lee, Thomas C.
Boots, shoes, and leggings
3642412, 364280, 3642808, 3642804, 3642809, 3642813, 3642832, 3642563, 3642558, 364DIG1, 364DIG2, 395375, G06F 945, G06F 1208, G06F 906, G06F 1314
Patent
active
052187128
ABSTRACT:
In a data processing system employing microcode techniques, complex sequences of microinstructions can be initiated by application of a single macroinstruction. These complex sequences of microinstructions are typically noninterruptible and therefore the execution of a macroinstruction is atomic (i.e., executed as a single entity). Data processing systems that do not employ microcode typically have simpler macroinstruction sets that do not provide for a similar atomicity for complex instruction sequences. In order to obtain the same atomicity of instruction execution and to provide a nonmicrocoded data processing system with the capability to execute complex instruction sequences as an atomic operation, the nonmicrocoded data processing system is provided with a third mode, in addition to the (nonprivileged) user mode and the (privileged) kernel mode, of operation that permits the execution of instruction sequences with interrupting events disabled and certain functions and apparatus enabled to facilitate instruction sequence execution.
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Bhandarkar Dileep
Cardoza Wayne
Cutler David N.
Orbits David A.
Witek Richard T.
Digital Equipment Corporation
Lee Thomas C.
Pan Daniel H.
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